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Duramax 6600 Welcome to the Internet's first Duramax 6600 diesel discussion forum for the LB7, LLY, LBZ, LMM, LML, LGH & L5P RPO code engines. Tips on performance, fuel economy, troubleshooting and more.

 
 
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Old 11-12-2017, 04:42 PM
chessy56 chessy56 is offline
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Join Date: Jan 2006
Location: South Milwaukee, WI
Posts: 230
Default P140B code

I'm getting a P140B code on a L5P Dmax, suggesting the EGR valve response is slow. Now, this code is being read on an older model Edge monitor which was originally used on my old LB7 2001. I have NO check engine light at the moment. I can clear it, but it reappears the next time I read the DTCs. Should this be something to be concerned with or just a false alarm?
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"Chessy56"
So. Milwaukee, WI
'01 2500HD, LB7, 440K miles
"Stock" engine. Dual fuel filtration system with Kennedy lift pump, BF Goodrich Commercial T/A Traction tires (sold to a dude from Texas- it's living a warmer life just fine down there now!).

'17 2500HD, L5P (Happy Birthday/Merry Christmas to me!!!) Currently bone stock, 90K miles.

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